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3 Sheets-$heet 1.

(No Model.)

G. W. A MESBURY.

DEVICE FOR SHARPENING SAWS.

No. 378,277. Patented Feb. 21, 1888.

INVENTOR,

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(No Model.) 3 Sheets-Sheet 2. G. W. AMESBURY.

DEVICE FOR SHARPENING SAWS. No. 378,277. Patented Feb. 21. 1888.

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s Sheet--Sheet a.

(No Model.)

G. W. AMESBURY.

DEVICE FOR SHARPENING SAWS.

No. 878,277. Patented Feb. 21, 1888.

ATTORNEY N PETERS. Plwlo'Lifl-ngmphw. Washvnglun. u, c,

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' GEORGE W. AMESBUEY, OF PHILADELPHIA, PENNSYLVANIA; GEORGE M.

BRILL ADMINISTRATOR OF SAID GEORGE "W. AMESBURY, DECEASED.

' DEVICE FOR SHARPENING SAWS.

. SPECIFICATION forming part of Letters Patent No. 378,277, dated February 21, 1888.

Application filed May 5, 1886. Serial No. 201,206. (No model.)

, To all 2071,0722, it may concern: an elevation, partly broken away, of saw Be it known that I, GEORGE "W. AMEsholder or clamp. Fig. 12 is a plan of same, BURY, a citizen of the United States, residing partly sectional. Fig. 13 is a modified form at Philadelphia, in the county of Philadelphia of holder for circular saw; and Fig. 14 is a 55' and State of Pennsylvania, have invented oerplan of same, partly sectional.

tain new and useful Improvements in Saw- A indicates the frame of the machine,which Sharpeners, of which the following is a specimay be made as shown or otherwise, as defication, reference being had therein to the sired. To preferably the rear end of the frame accompanying drawings. is mounted a power or driving shaft, B,which 60 My invention has relation to saw-sharpenmay have either fixed or sliding bearings as ers; and it has for its object to provide a sin1 desired, and is preferably provided with a ple, durable, effective, and quick-acting sawdrum, Z1, between the sides a. a of frame A, and sharpener wherein thesawteeth aresharpened has at one end loose and fixed pulleys b b, by revolving disks, preferably of emery or (see Fig. 4,) and at the otheraworm, l),whioh 6 analogous material, which disks sharpen the gears with a worm-wheel, 0, upon a side shaft, saw-teeth in the direction of their set, there 0, having suitable bearings, c c, and an end being preferably a pair of disks, and each one disk or crank, 0 which is approximately in is arranged for operation to sharpen alternate iine with the front of the frame A. The latter teeth,and which within their limit of size are is provided with top and bottom guides or 2o susceptible of being used for any kind and any ways, (I, in which is fitted to slide therein a size of saw, but are especially adapted to band, frame, D. The guides (1 may be of any suitjig, or like saws. able construction, and the parts or top and My invention accordingly consists of the bottom edges of frame D sliding therein are combination, construction, and arrangement correspondingly formed to fit the guides. 7

2 5 of parts, as hereinafter described and claimed, To frame D are secured yokes or brackets having reference particularly to rotary sharp- E, having bearings e for spindles or shafts c, suing-disks made of emery or analogous mawhich carry the sharpening-disks F. These tcrial, to rotary disks supported in a reciprobrackets E may be secured to the frame 1), eating frame, to rotary disks supported in as desired, or they maybe a partof same; o brackets having a pivoted or tilting conneebut I prefer to attach them to the frame so tion with adjusting mechanism ina reciprocatthat they may be adjusted from a vertical to ing frame, and to an automatic feed secured to an angular or inclined position for the purand moving with the reciprocating frame. pose of altering the plane of the sharpening- In the drawings, which illustrate a sawdisks or to give them and their sharpening- 3 5 sharpener embodying my improvements, Figedges an inclination to fit the different forms ure 1 represents a perspective view of same. or shapes of saw-teeth, and thereby avoiding Figs. 2 and 3 are diagrams showing direction the necessity of having difierent sharpeningof reciprocation and rotation of the sharpcnwheels for different forms and sizes of teeth.

ing-disks for sharpening alternate saw-teeth To do this I preferably form or secure lugs d 0 c in the direction of their set. Fig. 4- is a front upon the rear side of frame D, near each end. view, partly sectional. Figs. 5 and 6 are sec- (See more plainly Figs. 7 and S.) In-lugs d tional views of different constructions of emare elongated slots al and at their rear ends r cry or sharpening wheels and manner of securare lips (1, through which pass set-screws (1,

ing them to their shafts or spindles. Fig. 7 is the forward ends of which impinge against 5 a detail end elevation showing pivoted or tiltthe back of lugs eflcaston brackets E. Through ing bracket and adjusting mechanism forshaft slots at in lugs (1 pass thumb or adjusting or spindle of rotary disk, reciprocating frame, screws dflwhich fasten the brackets E to frame and part of main frame of the machine. Fig. D, and when loosened admit of turning or tilt- 8 is a section on line 1 1, Fig. 7. Figs. 9 and ing the brackets and of adjusting them forx00 50 10 are detail elevations showing different powardly and backwardly by the movement of sitions of automatic feed devices. Fi 11 is the set-screws (2 along slots d thereby either altering or inclining the plane of disks F or moving the disks or their edges to and from the saw-holder, if desired. The set-screws d are suitably manipulated to admit of said adjustments.

The spindles or shafts are preferably, and as shown, verticallylocated, and have grooved driving-wheels g, with collar 9 and set-screw, so that the wheels may be adjusted up and down on the spindle, and the latter have step or stop collars 1 with set-screws to admit of raising or lowering the spindles or shafts in bearings e e to adjust the height of the disks F,which project, preferably, above the top of frame A, as shown, and are parallel with each other.

Between the disks, and attached to the top of the front side of frame D, are the automatic feed bars or pawls H, which are pivoted, by a screw, h, or otherwise, as desired, to abracket, h, having at its lower end an elongated slot, h", through which passes a set-screw, lf,which secures the bracket h and bars H to the frame D, or toa lug thereon, and provides for raising and lowering said bracket h to adjust the height of bars H in relation to the disks or their grinding-edges.

At the top oflug or bracket h is a forwardlyprojecting lip, h", having set or stop screws h, one for each bar H, and which pass through the lip and abut against the upper sides of the limbs h of feed-bars H. These limbs h are shown as preferably diverging from one another in opposite directions from their pivotal connection, and their ends it cross one another to form weights or gravity devices for holding the limbs h up against the set or stop screws h. By adjusting the latter the inclination of the limbs If may be varied as desired for feeding different sizes of teeth.

The feed arms or pawls H are, as shown, so arranged that pressure applied to the under side of limbs 71. does not affect their position; but when applied to the upper side of said limbs the arms are tilted or oscillated on their pivotal points, as shown by dotted lines, Fig.

" -10, so that the bar that is not feeding is free to tilt as it passes across the back of a tooth.

The saw-holder I is suitably secured to the frame A, and consists, essentially, of an L- shaped bracket or arm, z, having a fixed jaw, i, and a movable jaw, i", hinged to the former. Both said jaws form a holder or clamp, the closing pressure of which is regulated by an adjusting-screw, t, in lugs i, formed on or secured to the ends of the jaws next to the sharpening-disks, and having a pressure-spring, i which acts to close the jaws. Between the latter is a thin loose plate, strip, or block, '5, havinga bent or turned-down upperv end, i. The lower end of the block or plate engages with a bolt, 2' working in a slot, i, in the fixed jaw, to fix or adjust the strip in any de sired position within the limits of slot 1' to suit different widths of saws. By adjusting screw 13 the closingpressure of the jaws of the holder or clamp is varied as desired to accommodate saws of difierent thicknesses. A suitable screw thimble and rod, '5 screws into the movable jaw and abuts against the front edge of strip 6, to maintain it in its adjusted position. (See Fig. 13.) This form of holder or clamp is preferably used for band, jig, and like saws; but forcircular saws the holder consists merely of a fixed jaw or plate, 2', provided with a slot, i near its upper end, for the reception of a bolt, pin, or shaft, i upon which the saw is loosely mounted for sharpening, as illustrated in Fig. 12; or any other desired form of saw holder or clamp may be used, as the construction of the same is not an essential part of my invention.

The grooved pulleys g on disk-shafts e are connected to drum or shaft 7) by belting B,arranged to cause the disks or their spindles to revolve preferably in opposite directions, as indicated by the arrows 1, Fig. 1. These disks may be circular files of any suitable or desired kind, or other sharpening or abrading disks may be used; but on account of economy in construction, effectiveness of sharpening, durability',and low expense of replacing the disks I prefer to make them of emery, having beveled or other suitably-configured sharpeningfacesf, as shown, which disks are either solid with central shaft-hole, as shown in Figs. 1 and 5, or are in the form of an annular ring, as indicated in Fig. 6, either of which is secured to its spindle in any desired or suitable manner.

\Vhen shaft 0 is provided with the end disk or wheel, o the frame D is in gear therewith by a link, k, which has an eccentric connection, it, with wheel 0 as shown. If a crank is substituted for the wheel a, one end of the link is connected to the outer end ofthe crank in the usual manner. The effect of the foregoing-described construction is that as the disks F are rotated in opposite directions by shaft b the shaft 0, through the medium of link It, reciprocates frame D.

The foregoingdescribed constructiomit will be noted, provides a pair of sharpeningdisks which revolve in opposite directions, and inclined feed-bars, one for each disk, located be tween the disks, both disks and feed-bars being attached to a reciprocating frame for moving the disks and feed-bars to and fro across the saw-teeth. As the frame F reciprocates, the under edge of the feed-bar farthest from the disk, advancing to the saw, engages with the face of the first tooth or the one previously sharpened, and acts to feed the saw downward to bring the next tooth above in line with the advancing disk to cause each disk to sharpen alternate teeth of the saw. As the disks rotate in opposite directions, they sharpen or grind the teeth in the direction of their set. This result is plainly indicated in Figs. 2 and 3, of which Fig. 2 represents the disks as reciprocating in the direction of arrow 2 and the disk to the left advancing to the saw-tooth which has a set in the direction of rotation of said disk, and Fig. 3 represents ITO the disks moving or reciprocating in an opposite direction and the disk to the right advancing to the sawtooth which has an opposite set and in the direction of the rotation of the disk.

As the belting or gear-connection for rotating disks F may be arranged to variously rotate the disks according to the character of the grind desired, I do not limit myself to any one arrangement of same.

iVhat I claim is-- 1. Inasaw-sharpcner, areciprocatingframe, D, a pair of grindingdisks placed edge to edge and mounted on said frame, actuating mechanisms for said frame and disks to cause them to operate to sharpen alternate teeth of a saw, and a feeding device for the saw, substantially as set forth.

2. In a sawsharpener, the combination of reciprocating frame D,rotary disks F, mounted on said frame and placed edge to edge, feedbars H, saw holder or clamp L, and actuating devices for said frame, disks, and feed-bars, substantially as set forth.

3. The con1bination,withasaw-holder, of the reciprocating frame D, rotary grinding-disk F, mounted on said frame, and actuating devices, substantially as set forth,

4:. In a saw-sharpener, the combination of the reciprocating frame, rotary grinding-disks mounted on said frame, saw-feeding bars, sawholder, devices for actuating the disks and feeding-bars, and devices for adjusting the disks to and from the saw-feeding bars and for varying the inclination of the disks and for moving them to and from the saw-holder, substantially as set forth.

5. The combination of a reciprocating frame, brackets or yokes in said frame, rotary grinding or sharpening disks in said brackets, and actuating devices for said frame and disks, substantially as set forth.

6. In a saw-sharpener, the combination of reciprocating frame D, rotary grinding-disks F, mounted upon said frame and revolving in opposite directions, and actuating devices, subr stantially as set forth.

7 In a saw-sharpener, the combination of a reciprocating frame, D, rotary disks F, mounted on said frame, and actuating mechanism for the frame and disks, substantially as and for the purpose set forth.

8. In combination with drum-shaft B, sliding frame D, rotary disks F in said frame, actuating mechanism for the latter, and powertransmitting devices between shaftB and disks F, substantially as set forth.

9. The combination of a saw-holder, a feeding device consisting of inclined bars, sharpening-disks, and actuating devices for rotating and reciprocating said disks, substantially as set forth.

10. In a saw-sharpener, the combination of the sliding frame D, pivoted or tilting and sliding brackets or yokes E, and grinding'disks F, supported in said yokes, and actuating devices for said frame, yokes, and disks, substantially as set forth.

11. In a saw-sharpener, the combination of a reciprocating frame, D, rotary grinding-disks F, mounted upon said frame, a sawholder composed of two jaws having spring closing devices, a sliding block located between the jaws, a feeding device, and actuating mechanism for the frame, disks, and feeding device, substantially as set forth.

12. The pivoted inclined feed-bars H, in combination with adjustable bracket h, having stop-screws h for the feed-bars, substantially as and for the purpose set forth.

13. In combination with frame D, having lugs d, with slot (1 and lip d brackets or yokes E, having bearings e and lugs e, and set-screws (1* and (1 substantially as and for the purpose set forth.

14. In a sawsharpener, the combination of a reciprocating frame, a pair of oppositely-inelined feed-bars pivoted to said frame, rotary grinding-disks mounted on said frame, and actuating devices for the frame and disks, substantially as set forth.

In testimony whereof I affix my signature in presence of two witnesses.

GEORGE W. AMESBURY.

Witnesses:

S. J. Van STAVOREN, CHAS. F. VAN HORN. 

